ntdll: Check for failure to get the user path in RtlOpenCurrentUser.

dlls/ntdll/reg.c

@@ -843,7 +843,7 @@ NTSTATUS WINAPI RtlFormatCurrentUserKeyPath( IN OUT PUNICODE_STRING KeyPath)
  *  If we return just HKEY_CURRENT_USER the advapi tries to find a remote
  *  registry (odd handle) and fails.
  */
-DWORD WINAPI RtlOpenCurrentUser(
+NTSTATUS WINAPI RtlOpenCurrentUser(
 	IN ACCESS_MASK DesiredAccess, /* [in] */
 	OUT PHANDLE KeyHandle)	      /* [out] handle of HKEY_CURRENT_USER */
 {
@@ -853,7 +853,7 @@ DWORD WINAPI RtlOpenCurrentUser(
 
 	TRACE("(0x%08lx, %p)\n",DesiredAccess, KeyHandle);
 
-	RtlFormatCurrentUserKeyPath(&ObjectName);
+        if ((ret = RtlFormatCurrentUserKeyPath(&ObjectName))) return ret;
 	InitializeObjectAttributes(&ObjectAttributes,&ObjectName,OBJ_CASE_INSENSITIVE,0, NULL);
 	ret = NtCreateKey(KeyHandle, DesiredAccess, &ObjectAttributes, 0, NULL, 0, NULL);
 	RtlFreeUnicodeString(&ObjectName);

include/winternl.h

@@ -2120,7 +2120,7 @@ ULONG     WINAPI RtlNumberOfClearBits(PCRTL_BITMAP);
 UINT      WINAPI RtlOemStringToUnicodeSize(const STRING*);
 NTSTATUS  WINAPI RtlOemStringToUnicodeString(UNICODE_STRING*,const STRING*,BOOLEAN);
 NTSTATUS  WINAPI RtlOemToUnicodeN(LPWSTR,DWORD,LPDWORD,LPCSTR,DWORD);
-DWORD     WINAPI RtlOpenCurrentUser(ACCESS_MASK,PHANDLE);
+NTSTATUS  WINAPI RtlOpenCurrentUser(ACCESS_MASK,PHANDLE);
 
 NTSTATUS  WINAPI RtlPinAtomInAtomTable(RTL_ATOM_TABLE,RTL_ATOM);
 BOOLEAN   WINAPI RtlPrefixString(const STRING*,const STRING*,BOOLEAN);